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为了有效控制地震作用下偏心结构扭转耦联振动所引起的灾变问题,在理论分析和数值计算的基础上,建立了地震作用下偏心结构的扭转耦联运动方程,通过研究黏滞阻尼器对偏心结构扭转耦联振动的控制效果,对比分析4种黏滞阻尼器常用布置方案下偏心结构的地震响应,量化了黏滞阻尼器和钢支撑共同保护作用下对偏心结构减震效果的影响。研究结果表明:设置有黏滞阻尼器的偏心结构,在双向地震作用下偏心结构最大层位移和层间位移角均得到有效的控制;在多遇地震作用下黏滞阻尼器人字型布置方式对控制偏心结构扭转效果明显,罕遇地震作用下不同布置方式的控制效果相差不大,其结果可为地震作用下类似的偏心结构扭转效应的振动控制提供借鉴参考。
In order to effectively control the catastrophic problems caused by the torsional coupling vibration of eccentric structures under earthquake action, the torsional coupling equations of the eccentric structure under earthquake action are established on the basis of theoretical analysis and numerical calculation. By studying the influence of viscous dampers on eccentricity The control effect of torsional coupling vibration of structure is analyzed. The seismic response of eccentric structures under four kinds of viscous dampers is compared and analyzed, and the influence of viscous damper and steel support on the damping effect of eccentric structure is quantified. The results show that the eccentric structure with viscous damper can effectively control the maximum displacement and the drift angle of the eccentric structure under the action of two-way earthquake. The herringbone arrangement of viscous damper The control effect of eccentric structure is obvious, and the control effect of different arrangement modes under rare earthquake is similar, the result can provide reference for the similar vibration control of eccentric structure under earthquake action.